NAME

assert - Abort the program if assertion is false.

SYNOPSIS

include <assert.h>

void assert (int expression);

DESCRIPTION

assert() prints an error message to standard output and terminates the program by calling abort() if expression is false (i.e., compares equal to zero). This only happens when the macro NDEBUG was undefined when <assert.h> was last included.

RETURN VALUE

No value is returned.

CONFORMING TO

ISO9899 (ANSI C). In the 1990 standard, expression is required to be of type int and undefined behavior results if it is not, but in the 1999 standard it may have any scalar type.

BUGS

assert() is implemented as a macro; if the expression tested has side-effects, program behaviour will be different depending on whether NDEBUG is defined. This may create HeisenBugs which go away when debugging is turned on.

Please note that any user can change the contents of pages on this site,
and therefore the Waikato Linux Users Group can offer no assurances that
the information is correct, and the information on this site is not
necessarily the opinion of the Waikato Linux Users Group, or any of its
members. If you have any complaints about the contents of this page,
please do not hesitate to contact the Waikato Linux Users Group, or, click
the Edit button!

Unless otherwise noted, all pages on this site are licensed under the
WlugWikiLicense.